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Izixhobo zohlobo lweAmerican Uhlobo olupheleleyo oluphezulu lokuvalwa kwendawo yokuvala i-crawer slides?
Ikakhulu intsimbi (eyomeleleyo, enzima). Abanye basebenzisa i-Aluminium (ukukhanya, i-rufurd-enganyangekiyo) okanye i-plastics ye-Nenjiweyo (yeenxalenye ezisondeleyo). Intsimbi ihlala inayo i-rust-ubungqina